| Effects of high-pressure rheo-squeeze casting on the Fe-rich phases and mechanical properties of Al-17Si-(1,1.5)Fe alloys |
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| 引用本文： | Chong Lin,Shu-sen Wu,Shu-lin L&#,Ping An,He-bao Wu. Effects of high-pressure rheo-squeeze casting on the Fe-rich phases and mechanical properties of Al-17Si-(1,1.5)Fe alloys[J]. 矿物冶金与材料学报, 2018, 25(9): 1018-1026. DOI: 10.1007/s12613-018-1652-1 |
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| 作者姓名： | Chong Lin Shu-sen Wu Shu-lin L&# Ping An He-bao Wu |
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| 作者单位： | State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| 基金项目： | This work was financially supported by the National Nat-ural Science Foundation of China;the China Postdoctoral Science Foundation;and the Open Research Fund Program of Hubei Provincial Key Laboratory of Chemical Equipment Intensification and In-trinsic Safety;The authors would also like to express their appreciation to the Analytical and Testing Center, HUST |
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| 摘 要： | The effects of high pressure rheo-squeeze casting (HPRC) on the Fe-rich phases (FRPs) and mechanical properties of Al-17Si-(1,1.5)Fe alloys were investigated. The alloy melts were first treated by ultrasonic vibration (UV) and then formed by high-pressure squeeze casting (HPSC). The FRPs in the as-cast HPSC Al-17Si-1Fe alloys only contained a long, needle-shaped β-Al5FeSi phase at 0 MPa. In addition to the β-Al5FeSi phase, the HPSC Al-17Si-1.5Fe alloy also contained the plate-shaped δ-Al4FeSi2 phase. A fine, block-shaped δ-Al4FeSi2 phase was formed in the Al-17Si-1Fe alloy treated by UV. The size of FRPs decreased with increasing pressure. After UV treatment, solidification under pressure led to further refinement of the FRPs. Considering alloy samples of the same composition, the ultimate tensile strength (UTS) of the HPRC samples was higher than that of the HPSC samples, and the UTS increased with increasing pressure. The UTS of the Al-17Si-1Fe alloy formed by HPSC exceeded that of the Al-17Si-1.5Fe alloy formed in the same manner under the same pressure. Conversely, the UTS of the Al-17Si-1Fe alloy formed by HPRC decreased to a value lower than that of the Al-17Si-1.5Fe alloy formed in the same manner.
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| 关 键 词： | high pressure rheo-squeeze casting Al-17Si-(1 1.5)Fe alloys Fe-rich phases mechanical properties |
Effects of high-pressure rheo-squeeze casting on the Fe-rich phases and mechanical properties of Al−17Si−(1,1.5)Fe alloys |
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| Chong Lin,Shu-sen Wu,Shu-lin Lü,Ping An,He-bao Wu. Effects of high-pressure rheo-squeeze casting on the Fe-rich phases and mechanical properties of Al−17Si−(1,1.5)Fe alloys[J]. International Journal of Minerals,Metallurgy and Materials, 2018, 25(9): 1018-1026. DOI: 10.1007/s12613-018-1652-1 |
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| Authors: | Chong Lin Shu-sen Wu Shu-lin Lü Ping An He-bao Wu |
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| Affiliation: | 1.State Key Laboratory of Materials Processing and Die & Mould Technology,Huazhong University of Science and Technology,Wuhan,China;2.Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety,Wuhan Institute of Technology,Wuhan,China |
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| Abstract: | The effects of high pressure rheo-squeeze casting (HPRC) on the Fe-rich phases (FRPs) and mechanical properties of Al?17Si?(1,1.5)Fe alloys were investigated. The alloy melts were first treated by ultrasonic vibration (UV) and then formed by high-pressure squeeze casting (HPSC). The FRPs in the as-cast HPSC Al?17Si?1Fe alloys only contained a long, needle-shaped β-Al5FeSi phase at 0 MPa. In addition to the β-Al5FeSi phase, the HPSC Al?17Si?1.5Fe alloy also contained the plate-shaped δ-Al4FeSi2 phase. A fine, block-shaped δ-Al4FeSi2 phase was formed in the Al?17Si?1Fe alloy treated by UV. The size of FRPs decreased with increasing pressure. After UV treatment, solidification under pressure led to further refinement of the FRPs. Considering alloy samples of the same composition, the ultimate tensile strength (UTS) of the HPRC samples was higher than that of the HPSC samples, and the UTS increased with increasing pressure. The UTS of the Al?17Si?1Fe alloy formed by HPSC exceeded that of the Al?17Si?1.5Fe alloy formed in the same manner under the same pressure. Conversely, the UTS of the Al?17Si?1Fe alloy formed by HPRC decreased to a value lower than that of the Al?17Si?1.5Fe alloy formed in the same manner. |
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